Even if gerrymandering evens out over long times, on short terms it can let a party have control over an/a few elections and use that to enact changes that will

Even if gerrymandering evens out over long times, on short terms it can let a party have control over an/a few elections and use that to enact changes that will affect the future. Sometimes you don't need 15 years to get something done, just one term.